IIIF content search service

[elynema]

Description

Create an API wrapper around Solr that submits the appropriate query and returns results formatted as IIIF content search results. At this time, we are just implementing the q search parameter, as others are optional.

IIIF content search API: https://iiif.io/api/search/2.0/

See #5786 for suggestion of format for search results

Done Looks Like

• Search service available on masterfiles (other objects out of scope for now)
• Service route example URI: avalon.xyz/master_files/ft848q60n/search?q=searchterm"
• Service returns results only for transcripts associated with the masterfile
• Each match result provides one annotation:
  • Annotation targets specific transcript routes, with time fragments for timed text sources (.vtt)
  • Annotation target refers to the URI for the body of the original annotation, which is a stable identifier
• annotation motivation should match the motivation of the original annotation (ex: supplementing)

[elynema]

Per conversation at Swarm on 5/22, we approved using a search service route that references the master_file directly and looks like:
avalon.xyz/master_file/ft848q60n/search?q=searchterm

[elynema]

Per the #search channel in IIIF slack, recommend that the motivation used for the annotation in the search response is the same as the motivation from the original annotation. In our case, that motivation = supplementing, since we currently only have supplementing motivations. In the future, we might have other types of annotations, though!